面向等高线与河流冲突处理的多约束移位方法

本文针对等高线与河流的不一致性问题，以移位等高线匹配河流为出发点，提出一种对每个特征点动态确定仿射变换模型进行移位的方法。该方法综合考虑移位角度比例、地形特征点相对位置、局部形态的保持和变换等因素，对各特征点实时计算其位移的角度、位置和缩放变化等约束建立其移位模型。实验结果表明，本文提出的方法能够较好地实现等高线到河流的一致性改正，可有效解决等高线与河流数据的空间匹配问题。

A Multi-constraints Displacement Method for Solving Spatial Conflict between Contours and Rivers

In the process of spatial data integration and matching, the inconsistency often occurs between the rivers and contour lines that generate some spatial conflicts just like “river climbing slope”. Aiming to solve the problem by displacing the contours to matching the river network, this paper put forward a new method for every feature point on contour lines to establish specially its displacement model by affine transformation. The method comprehensively considered relative positions of adjacent ridge and valley points, the angle proportion of different feature points for displacing and local shape of contours to be maintained and transformed, so that the calculation of three constrained parameters determine the displacement of points on the contours that is angle, location and scaling was proposed. To test the method, several experiments were taken to analysis. The results showed that the research can effectively complete the displacement of contour lines to match the river network.